Senior Frontend Engineer - React (Remote)

🏢 Summary: Senior Backend Engineer role focused on designing, building, and scaling backend systems for a SaaS platform using Node.js and TypeScript. The position involves owning backend projects end-to-end, shaping architecture, and ensuring scalable, high-performance infrastructure. You will collaborate cross-functionally while mentoring engineers and driving backend best practices. 🗂️ Requirements: 5+ years of backend software development experience, Proven experience delivering end-to-end backend solutions, Deep expertise in Node.js, Strong experience with TypeScript, Strong experience with relational databases, Experience with MySQL, Experience building scalable and performant backend systems, Knowledge of API design, Knowledge of data modeling, Experience with testing and performance optimization, Professional English communication skills, Legal authorization to work in the EU 📃 Skills: Node.js, TypeScript, MySQL, Redis, ElasticSearch, MongoDB, React, API, SQL, NoSQL, Testing, Performance 🏢 Description: At ChurchDesk, our mission is to help churches modernize and stay connected with their communities in a rapidly changing world. As a SaaS company, we provide digital tools that enable churches to streamline operations, communicate effectively, and engage their congregations. Over the past 15 years, we’ve grown from a startup into an international business, yet we remain a small, collaborative team where your impact will be visible from day one. We value diversity, inclusivity, and the unique perspectives each person brings to our mission. About your new role As a Senior Backend Engineer , you will: Take hands-on ownership of backend projects, solving complex problems and driving implementations to completion. Play a key role in shaping our backend architecture, driving best practices, and maintaining a scalable, performant infrastructure. Mentor and support other engineers, helping grow the team’s technical capabilities. Collaborate closely with our product team, designers, and other engineers to ensure backend solutions align with product goals. Build reliable, scalable, and modular systems using NodeJS, TypeScript, MySQL, Redis, and ElasticSearch. Contribute to continuous improvement of our engineering practices and the evolution of our product to meet customer needs. Skills & Requirements Has 5+ years of software development experience , with a proven track record of delivering end-to-end backend solutions. Has deep expertise in Node.js , TypeScript, and relational databases (particularly MySQL) . Has experience building scalable, performant, and modular backend systems . Understands modern backend engineering practices, including API design, data modeling, testing, and performance optimization. Demonstrates excellent written and verbal communication in English , collaborating effectively with product team and engineers to shape and refine backend features. Has experience working remotely and is based in Copenhagen or elsewhere in the EU , with legal authorization to work. Nice-to-Have Familiarity with NoSQL datastores such as ElasticSearch, Redis, or MongoDB. Familiarity with React Native , as our mobile apps and in-person donation terminals are built using it. Experience with AI-assisted development workflows , such as prompt engineering or code generation tools. What We Offer The opportunity to make a real impact on a product used by some of the largest and oldest institutions in the world . A supportive, low-ceremony, and lean-process environment where your ideas and contributions are valued. Permanent contract with 6 weeks of paid vacation plus local public holidays to support work-life balance. Enjoy the opportunity to collaborate in person and work from our Berlin and Copenhagen offices. A social, collaborative culture with annual kick-offs, team trips, and friendly challenges. Growth opportunities to develop your skills and career in a fast-moving, international team. About ChurchDesk At ChurchDesk, we believe that the church plays an important role in society. Our platform is used by thousands of congregations to organise their work, improve communication with members, reach more people, and unlock new ways of fundraising. Our customers are part of one of the largest and oldest institutions in the world: the Church. It is undergoing significant change to prepare for the future — and we are here to support that transformation. For churches across Europe, it is crucial to work more efficiently and stay connected to their members and communities. ChurchDesk has been around for more than 10 years — evolving from a startup into an international company serving customers across Europe. And we’re just getting started! We actively live our values in our daily work: #challenge: We challenge ourselves — and our customers — to continuously improve. We work like a professional sports team: with ambition, discipline, and strong team spirit. #dogoodbusiness: Doing good business is a marathon, not a sprint. It requires endurance, quality, and integrity — every single day. #jointheride: The journey matters just as much as the destination. Be part of it, celebrate successes — and have fun! We value being together, especially in the office.

🏢 Summary: Senior React Native Mobile Engineer responsible for leading and modernizing a mobile application, bringing web features to mobile and ensuring scalable, high-quality architecture. The role involves hands-on development, architectural decisions, and close collaboration with product and engineering teams. Focus is on building maintainable, high-performance mobile solutions using modern tooling and AI-augmented workflows. 🗂️ Requirements: 5+ years of mobile development experience, Proven delivery of mobile projects end-to-end, Deep expertise in React Native, Strong experience with Expo, Strong proficiency in TypeScript, Experience architecting scalable mobile applications, Knowledge of state management and navigation in mobile apps, Experience with performance optimization and offline capabilities, Experience integrating native modules, Professional English communication skills, EU-based with legal authorization to work 📃 Skills: React, ReactNative, Expo, TypeScript, JavaScript, NoSQL, ElasticSearch, Redis, MongoDB, Node.js, TanStackQuery 🏢 Description: At ChurchDesk, our mission is to help churches modernize and stay connected with their communities in a rapidly changing world. As a SaaS company, we provide digital tools that enable churches to streamline operations, communicate effectively, and engage their congregations. Over the past 15 years, we’ve grown from a startup into an international business, yet we remain a small, collaborative team where your impact will be visible from day one. We value diversity, inclusivity, and the unique perspectives each person brings to our mission. About your new role As a Senior React Native Mobile Engineer , you will: Take lead and ownership of our mobile applications, while contributing in a senior capacity on projects. Drive the modernization of our existing mobile app, bringing key features from the web platform to mobile and optimizing the overall experience. Work hands-on to deliver high-quality, maintainable, and scalable mobile experiences. Collaborate closely with our product team, designers, and other engineers to shape product features. Support teammates by sharing knowledge, best practices, and architectural guidance. Embrace AI-augmented workflows to accelerate development, enabling focus on high-level architecture and complex mobile logic. Build and maintain prompt libraries and custom AI instructions to keep mobile architecture consistent and accessible. Apply senior-level judgment to balance rapid prototyping with long-term maintainability and scalability. Skills & Requirements You have 5+ years of mobile development experience with a track record of delivering successful projects end-to-end. You have deep expertise in React Native, Expo and TypeScript , and modern mobile tooling. You can architect stable and scalable mobile systems, including component structure, application state management, and navigation. You understand modern mobile engineering practices, such as performance optimization, offline capabilities, and native module integration. You communicate clearly in English, both in writing and verbally, and you collaborate effectively with product teams and engineers to shape and refine product features. You have experience working remotely and are based in the EU, with legal authorization to work . Nice-to-Have Familiarity with NoSQL datastores such as ElasticSearch, Redis, or MongoDB. Experience with our web stack: React and TanStack Query, enabling you to bridge features between web and mobile. Experience with AI-assisted development workflows, such as prompt engineering or code generation tools. Familiarity with Node.js , as our backend stack runs on it. What We Offer The opportunity to make a real impact on a product used by some of the largest and oldest institutions in the world . A supportive, low-ceremony, and lean-process environment where your ideas and contributions are valued. Permanent contract with 6 weeks of paid vacation plus local public holidays to support work-life balance. Enjoy the opportunity to collaborate in person and work from our Berlin and Copenhagen offices. A social, collaborative culture with annual kick-offs, team trips, and friendly challenges. Growth opportunities to develop your skills and career in a fast-moving, international team. About ChurchDesk At ChurchDesk, we believe that the church plays an important role in society. Our platform is used by thousands of congregations to organise their work, improve communication with members, reach more people, and unlock new ways of fundraising. Our customers are part of one of the largest and oldest institutions in the world: the Church. It is undergoing significant change to prepare for the future — and we are here to support that transformation. For churches across Europe, it is crucial to work more efficiently and stay connected to their members and communities. ChurchDesk has been around for more than 10 years — evolving from a startup into an international company serving customers across Europe. And we’re just getting started! We actively live our values in our daily work: #challenge: We challenge ourselves — and our customers — to continuously improve. We work like a professional sports team: with ambition, discipline, and strong team spirit. #dogoodbusiness: Doing good business is a marathon, not a sprint. It requires endurance, quality, and integrity — every single day. #jointheride: The journey matters just as much as the destination. Be part of it, celebrate successes — and have fun! We value being together, especially in the office.

🏢 Summary: Senior Frontend Engineer role focused on building enterprise-grade AI-powered Next.js applications with complex state management, real-time features, and scalable frontend architecture. The position involves creating advanced AI interfaces, improving performance and accessibility, and contributing to design systems in a fully on-site Warsaw office environment. Candidates will work with modern AI development tools and enterprise-scale frontend technologies. 🗂️ Requirements: 5+ years of frontend development experience, 3+ years of React experience, Strong TypeScript skills, Production experience with Next.js, Knowledge of App Router, Knowledge of Server Components, Understanding of SSR, Understanding of SSG, Understanding of CSR, Experience with complex state management, Experience with real-time updates, Experience with optimistic UI, Experience with multi-tenant systems, Experience building AI or LLM interfaces, Knowledge of frontend performance optimization, Experience improving Core Web Vitals, Understanding of accessibility standards, Understanding of localization, Understanding of frontend security, Experience handling sensitive data, Experience using AI coding assistants, Strong communication skills, Ability to work fully on-site in Warsaw 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, AI, LLM, CoreWebVitals, Accessibility, Localization, Security, ReactFlow, Highcharts, Node.js, Python, RAG, OpenAI, Codex, GitHub, Copilot 🏢 Description: About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with well-known enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and processes real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2, HIPAA-ready security practices, and strong integrations. Job description We are looking for a Senior Frontend Engineer who enjoys building high-quality user interfaces for enterprise AI products. In this role, you will design and build important frontend features, solve complex UI problems, and improve the user experience over time. You will take ownership of frontend architecture and help build production Next.js applications with complex state management, real-time AI features, and enterprise functionality. The position is based in Warsaw and requires working from the office. Responsibilities - Design and build production Next.js applications that support complex state, high traffic, and real-time AI features. - Create user interfaces for AI-powered tools, including streaming AI responses, semantic search, knowledge graphs, and AI agents. - Build and improve our component library and design system to keep the user experience consistent, accessible, and reusable. - Deliver enterprise features such as localization, accessibility, browser compatibility, and security. - Monitor applications after release, improve performance, reduce bundle size, track Core Web Vitals, and help systems scale. - Maintain high engineering standards through code reviews, testing, and mentoring other developers. Requirements - More than 5 years of frontend development experience, including at least 3 years working with React and modern TypeScript. - Strong experience building production applications with Next.js, including App Router, Server Components, and understanding SSR, SSG, and CSR. - Experience managing complex application state, including real-time updates, optimistic UI, multi-tenant systems, and large amounts of data. - Experience building AI or LLM-based interfaces such as chat applications, streaming responses, or semantic search. - Strong knowledge of frontend performance and experience improving Core Web Vitals in large applications. - Good understanding of accessibility, localization, security, and enterprise application standards. - A security-focused approach and experience working with sensitive data. - Strong product thinking and the ability to improve user experience without waiting for detailed designs. - Experience using AI coding assistants as part of your daily development work. - Good written and spoken communication skills and the ability to explain technical decisions clearly. Nice to have - Experience with React Flow, Highcharts, or other data visualization libraries. - Experience building vector search, RAG, generative AI, or semantic search interfaces. - Basic knowledge of Node.js or Python to understand backend code and APIs. - Experience contributing to design systems or open-source UI libraries. What we offer - B2B contract and company stock options. - MacBook Pro. - Modern technology stack and the opportunity to contribute to open-source projects. - An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values - Quality – We care about excellent work and high standards in everything we build. - Momentum – We take initiative, share ideas, and keep moving forward. - Accountability – We take responsibility for our work and give honest, respectful feedback. - Hard work – We believe success comes from teamwork, dedication, and consistent effort. - Learning agility – We stay curious, learn from mistakes, and continue improving. - Adapt and thrive – We welcome change and see challenges as opportunities to grow. - Win together – We work as one team, communicate openly, and support our shared goals.

🏢 Summary: Senior/Lead Frontend Engineer role focused on building and leading the development of modern, high-performance React web applications. The position involves architecting scalable frontend solutions, creating reusable UI components, and driving best practices in code quality, accessibility, and performance. You will influence technical decisions, mentor developers, and contribute to product experience and frontend architecture. 🗂️ Requirements: University degree in Information Technology or related field or equivalent experience, 7+ years of software development experience focused on modern frontend technologies, Strong experience with React.js and component-based development, Experience building dynamic and customizable layouts, Experience with design systems and reusable UI component libraries, Knowledge of clean code principles and design patterns, Experience with scalable frontend architecture, Experience integrating REST or GraphQL APIs, Experience with state management tools, Experience with modern frontend build tools, Experience with modern styling systems, Professional English communication skills 📃 Skills: React, JavaScript, TypeScript, Redux, Zustand, REST, GraphQL, Vite, Webpack, ESBuild, CSS, Tailwind, styled-components, CSS-in-JS 🏢 Description: AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role As a Senior/Lead Frontend Engineer , you will lead the development of modern web applications, crafting high-performance, scalable, and reusable UI components that bring complex data to life. Working with React and modern frontend architectures, you’ll drive technical decisions, mentor developers, and shape best practices in code quality, accessibility, and performance. This role offers strong influence on product experience and architecture while contributing to a collaborative, innovation-driven environment. What you will do Contribute to the frontend development of new web applications; Design and implement high-performance, maintainable, and reusable UI components; Drive the migration to modern tech stacks and architect scalable features for React applications; Visualize complex data sets using advanced frontend techniques; Ensure best practices in front-end architecture, code quality, accessibility, and testing; Participate in code reviews, technical discussions, and mentorship of developers; Continuously research and advocate for improvements in performance, scalability, and developer experience. Must haves University or college degree in Information Technology or a related field, or relevant work experience; 7+ years of software development experience with a strong focus on modern web frontend technologies; Solid experience with React.js and component-based development; Strong understanding of building dynamic and customizable layouts; Experience building or consuming design systems and reusable UI component libraries; Knowledge of clean code principles, design patterns, and scalable frontend architecture; Experience integrating REST or GraphQL APIs into web applications; Experience with state management tools such as Redux or Zustand ; Experience with build tools such as Vite , Webpack , or ESBuild ; Experience with styling systems such as CSS Modules, Tailwind , styled-components, or CSS-in-JS; Structured and analytical working style with strong team collaboration skills; Excellent English communication skills. Nice to haves German language proficiency. The benefits of joining us Professional growth Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps Competitive compensation We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities A selection of exciting projects Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands Flextime Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive. Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match — you’ll get an offer!

🏢 Summary: Senior Frontend Engineer role focused on driving architectural direction and building scalable, high-quality frontend solutions using React and TypeScript. The position involves designing core features, shaping best practices, improving CI/CD and observability, and mentoring engineers. The engineer will collaborate cross-functionally to deliver performant, maintainable, and accessible user experiences. 🗂️ Requirements: Extensive experience with large-scale frontend applications, Strong hands-on experience with React, Strong hands-on experience with TypeScript, Deep understanding of web architecture and component design, Experience with performance optimization and responsive UI patterns, Solid knowledge of build tools, Experience with version control systems, Experience with CI/CD pipelines, Ability to design scalable and maintainable frontend solutions, Experience contributing to testing and deployment processes 📃 Skills: React, ReactNative, TypeScript, JavaScript, CI/CD, Git, HTML, CSS, Web, Serverless, Cloud 🏢 Description: Senior Frontend Engineer We’re looking for a seasoned engineer who combines deep hands-on skills with the ability to guide architectural direction, influence technical strategy, and mentor others. About the Role Your work will directly shape how thousands of businesses worldwide interact with the clients solutions — improving user experiences, driving customer satisfaction, and helping companies save valuable time. As part of this role, you will be making technical decisions, mentor colleagues, and contribute to setting best practices that strengthen frontend engineering across the company. You’ll collaborate closely with product managers, UX designers, and backend engineers to turn ideas into well-engineered solutions — balancing product velocity with long-term maintainability. Key Responsibilities Drive architectural and technical direction for frontend solutions across product suite. Design and implement core features and shared components using React/React Native, and TypeScript. Evaluate and introduce new technologies, patterns, and tools that improve scalability, maintainability, and performance. Contribute to the design system and ensure consistent, accessible, and performant user experiences. Work closely with other engineers to review code, share knowledge, and improve development practices. Act as a technical mentor — helping others grow through feedback, guidance, and collaboration. Ensure strong build, deployment, and testing processes that support rapid, reliable delivery. Contribute, or lead, broader engineering initiatives such as CI/CD improvements, observability, and cross-product consistency. Key Requirements Extensive experience in building and maintaining large-scale frontend applications. Deep understanding of web architecture, component design, performance optimization, and responsive UI patterns. Strong hands-on experience with React and TypeScript. Solid knowledge of build tools, version control, and CI/CD pipelines. A pragmatic mindset — able to balance innovation with delivery. Excellent collaboration and communication skills. Passion for technical craftsmanship and for helping others grow through mentorship and example. Nice to Have Experience in designing intuitive user interfaces. Familiarity with cloud services and serverless architectures. Knowledge of accessibility standards in web development. Location: København Allocation: Full-time. Start date: ASAP End date: 3-6 months

🏢 Summary: Senior Frontend Engineer role focused on building and evolving scalable, maintainable web applications using React. The position involves leading development of user-facing features, ensuring performance and accessibility, and shaping the frontend architecture. You will own features end-to-end and collaborate closely with product and design to deliver high-quality solutions. 🗂️ Requirements: Commercial experience with React, Experience building complex frontend features, Ability to work independently on frontend tasks, Experience collaborating with product and design stakeholders, Strong focus on code quality and maintainability, Experience optimizing performance and accessibility 📃 Skills: React, JavaScript, TypeScript, HTML, CSS, Testing, Accessibility, Performance, Git, DesignSystems 🏢 Description: We are hiring a Senior Frontend Engineer to join a product-focused team working on modern web applications for our client. In this role, you’ll take the lead in building user-facing features that are reliable, scalable, and easy to maintain. You’ll work at the intersection of engineering, product, and design — turning ideas into real, high-quality solutions used by end users. This is a position for someone who is comfortable making decisions, taking responsibility for their work, and actively shaping the frontend layer of the product. Your day-to-day Build and evolve frontend features with a focus on scalability and long-term maintainability Turn product concepts and design mockups into functional, high-quality interfaces Work closely with product and design stakeholders to refine solutions and improve user experience Take care of application performance, accessibility, and overall code health Influence technical direction within the frontend domain Spot inefficiencies and improve existing solutions and codebase structure Own your work end-to-end — from idea to production. What we’re looking for Solid commercial experience in frontend development with React Confidence in delivering complex features without close supervision Experience collaborating with non-engineering stakeholders (e.g. product, design) Strong focus on code quality, readability, and long-term maintainability Ownership mindset — you don’t just implement tasks, you drive solutions. Nice to have Experience working on complex or large-scale web platforms Exposure to shared frontend ecosystems or multi-team environments Familiarity with component-driven development and design systems Interest in growing your skills in TypeScript and modern frontend testing practices

🏢 Summary: Senior Frontend React Developer role focused on building scalable Next.js applications that power enterprise AI interfaces, including chat, semantic search, and knowledge graph features. The position involves developing high-performance, real-time, and data-intensive user interfaces with strong emphasis on accessibility, security, and code quality. You will contribute to reusable design systems, performance optimization, and AI-assisted development in a modern tech stack. 🗂️ Requirements: 5+ years frontend development experience, 3+ years experience with React, Strong knowledge of JavaScript, Strong knowledge of TypeScript, Strong knowledge of Next.js including SSR, App Router, Server Components, Advanced TypeScript skills, Experience with modern CSS solutions (Tailwind CSS or CSS-in-JS), Experience with complex state management, Experience with real-time collaboration features, Experience building AI-related interfaces (chat, streaming, semantic search), Understanding of localization, Understanding of accessibility standards, Understanding of security standards, Experience with AI coding tools (OpenAI Codex or Claude), Upper-Intermediate (B2) English or higher 📃 Skills: React, Next.js, JavaScript, TypeScript, SSR, Tailwind, CSS-in-JS, SWR, WebSockets, ReactFlow, Highcharts, Storybook, Playwright, Node.js, Python, AWS, S3, CloudFront, Lambda, OpenAI, Claude, Codex, Copilot, Puppeteer, Cypress, Lerna, Turborepo, Nx, MCP, DSPy 🏢 Description: About Us Many companies want to use AI agents, but these tools often have problems with real business tasks. We create a platform that helps AI understand company rules, workflows, and processes, so it can give correct and reliable answers. Our technology is trusted by large international companies and works with leading AI and cloud platforms. Our goal is to help people find better answers and make better decisions with AI. Senior Frontend React Developer As a Frontend React Developer, you will build modern user interfaces that make enterprise AI easy to use and reliable. You will create Next.js applications that work with large amounts of data, real-time AI responses, and advanced business features. Your work will help thousands of users access important information quickly and confidently. What You Will Do Design and develop scalable Next.js SSR applications. Build interfaces for AI chat, semantic search, knowledge graphs, and AI builders. Create data visualizations using libraries such as React Flow and Highcharts. Develop multilingual, accessible, secure, and cross-browser compatible applications. Work with SWR for data fetching, caching, and real-time websocket updates. Build and maintain reusable UI components and a Storybook design system. Improve application performance, monitor Core Web Vitals, and write automated tests with Playwright. Use AI coding assistants to speed up development while keeping high code quality. Participate in code reviews, share knowledge, and support continuous learning within the team. Requirements At least 5 years of frontend development experience. More than 3 years of experience with React and JavaScript/TypeScript. Strong knowledge of Next.js, including SSR, App Router, and Server Components. Advanced TypeScript skills and experience with modern CSS solutions such as Tailwind CSS or CSS-in-JS. Experience building applications with complex state management, real-time collaboration, and high performance. Experience creating interfaces for AI features such as chat systems, streaming responses, or semantic search. Understanding of localization, accessibility, security standards, and writing maintainable code. Experience using AI coding tools such as OpenAI Codex or Claude. Upper-Intermediate (B2) or higher English communication skills. Nice to Have Experience with React Flow, Highcharts, or similar visualization libraries. Basic backend knowledge in Node.js or Python and experience discussing API design. Experience with vector search, RAG interfaces, or semantic search solutions. Familiarity with MCP, DSPy, or other AI frameworks. Experience with monorepo tools such as Lerna, Turborepo, or Nx. Knowledge of AWS services like S3, CloudFront, and Lambda. Experience with Playwright, Puppeteer, or Cypress. What We Offer B2B contract and company stock options. MacBook Pro for work. Modern technology stack and opportunities to contribute to open-source projects. Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, v0, MCP Servers, and credits for testing new AI technologies. Our Values We believe our success comes from the way we work together: Quality – We aim for excellent work and high standards in everything we do. Momentum – We take initiative and keep projects moving forward. Accountability – We take responsibility and give honest, respectful feedback. Hard Work – We solve difficult problems together and stay committed to our goals. Learning – We are curious, improve every day, and learn from mistakes. Adaptability – We accept change and see challenges as opportunities. Teamwork – We communicate openly, support each other, and succeed as one team.

🏢 Summary: Senior Frontend Engineer role focused on leading development of a high-traffic web application for shipping management and rate comparison. The position involves end-to-end frontend ownership, from translating designs into production-ready interfaces to optimizing performance and accessibility. You will shape architecture decisions and maintain standards within a React/TypeScript monorepo environment. 🗂️ Requirements: 8+ years of production frontend development experience, 3+ years in senior role within scale-up or start-up environment, Deep expertise in React and TypeScript, Strong knowledge of state management and component architecture, Proficiency in HTML semantics and modern CSS, Experience with web performance optimization and Core Web Vitals, Practical expertise in WCAG 2.2 AA accessibility standards, Experience with unit, integration, and end-to-end testing, Experience working with monorepos, Ability to contribute to frontend and API architecture decisions 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, Grid, Flexbox, WCAG, CoreWebVitals, Testing, Monorepo, API, AWS, Snowflake, Figma 🏢 Description: Senior Frontend Engineer Our Client is an ambitious tech company on a mission to create a frictionless shipping experience for SMEs. They wrap real-time pricing, comparison, booking, and tracking into a clean and unified interface, replacing outdated logistics processes with a seamless digital platform. Role We are looking for an experienced Senior Frontend Engineer to play a central role in shaping a web app where thousands of customers every week sign up, compare rates, manage integrations, and book shipments. You will work end-to-end—from understanding customer problems to shipping production code—while leading frontend work on a core value team (Customer Experience, Marketplace, or SaaS). Responsibilities Plan and lead frontend development within your value team, collaborating closely with PMs, designers, and backend engineers. Translate designs into production user interfaces that are accessible, performant, well-tested, and consistent with the rest of the product. Build prototypes to put working code in front of customers when validating product ideas. Own web performance on the surfaces you touch, ensuring excellent Core Web Vitals to boost conversion rates. Champion accessibility across the platform (WCAG 2.2 AA is the baseline). Contribute to architecture decisions that cross the frontend/backend line, including API boundaries and real-time updates. Maintain shared standards across a React/TypeScript monorepo through code reviews and technical councils. Mentor junior engineers and contribute to the evolution of the company's design system. Key competences 8+ years of experience writing production frontend code, with the last 3+ at a senior level in a scale-up/start-up environment. Deep React and TypeScript experience, with strong opinions on state management and component architecture. Solid web fundamentals: HTML semantics, modern CSS (Grid, Flexbox, container queries), browser rendering pipelines, and the network layer. Accessibility expertise as a practitioner skill, capable of spotting WCAG issues during design reviews. Fluency in web performance, measuring and optimizing Core Web Vitals on real products. High testing maturity (unit, integration, and end-to-end tests). Excellent written and spoken English communication skills. Bonus points for: Experience with large-scale monorepos, background in logistics/marketplaces/B2B SaaS, contributing to design systems, embedding AI-assisted features, or a working knowledge of Go. Salary and Conditions Salary up to 7000 Euro per month 100% remote from Poland B2B contract signed directly with our Client Start ASAP Benefits Work with a modern tech stack (React, TypeScript, AWS, Snowflake, Figma, Claude Code, etc.) A curious, collaborative, low-ego culture within a Great Place to Work certified environment

🏢 Summary: Frontend Engineer role focused on building enterprise AI applications using Next.js, React, and TypeScript in a fully on-site Warsaw office environment. The position involves developing real-time AI interfaces, managing complex frontend state, improving performance and accessibility, and contributing to technical decisions. Candidates will work with modern AI development tools and enterprise-scale frontend systems. 🗂️ Requirements: 3–5 years of frontend engineering experience, Strong knowledge of React, Strong knowledge of TypeScript, Strong knowledge of Next.js, Experience building production Next.js applications, Understanding of SSR, SSG, and CSR, Experience with complex state management, Experience with real-time updates and optimistic UI, Experience building AI or LLM-based interfaces, Understanding of frontend performance and Core Web Vitals, Knowledge of accessibility and localization, Security-focused development approach, Experience using AI coding assistants, Good communication skills, Ability to work fully on-site in Warsaw 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, AI, LLM, CoreWebVitals, Localization, Accessibility, Security, GitHubCopilot, OpenAI, Claude, ReactFlow, Highcharts, RAG, MCP, DSPy, Node.js, Python 🏢 Description: About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and processes real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2 and HIPAA-ready security practices. Job description We are looking for a frontend engineer with several years of experience who wants to build user interfaces for enterprise AI products. You will help create applications that allow users to work with AI systems in a simple and reliable way. You will build production applications using Next.js, work with complex application state, real-time AI features, and modern frontend technologies. Over time, you will also take part in important technical decisions. The position is based in Warsaw and requires working from the office. Responsibilities - Build and deliver production Next.js applications with complex state management and real-time AI features. - Create user interfaces for AI-powered tools, including streaming AI responses, semantic search, knowledge graphs, and AI agents. - Help improve our component library and design system to keep the UI consistent, reusable, and accessible. - Develop enterprise features such as localization, accessibility, browser compatibility, and security. - Monitor applications after release, improve performance, reduce bundle size, and track Core Web Vitals. - Use AI tools every day to improve development speed and internal frontend workflows. - Maintain high code quality through testing and code reviews. Requirements - Around 3–5 years of experience as a frontend engineer. - Strong knowledge of React, TypeScript, and Next.js. - Experience building production Next.js applications and understanding the differences between SSR, SSG, and CSR. - Good experience with state management, including real-time updates, optimistic UI, and multi-tenant applications. - Experience building AI or LLM-based interfaces such as chat applications, streaming responses, or semantic search. - Good understanding of frontend performance, Core Web Vitals, and user experience. - A security-focused approach and knowledge of accessibility and localization. - Experience using AI coding assistants as part of your daily development work. - Good communication skills and the ability to explain technical decisions clearly. Nice to have - Experience with React Flow, Highcharts, or other data visualization libraries. - Experience building vector search, RAG, or semantic search interfaces. - Knowledge of MCP, DSPy, or other modern AI frameworks. - Basic understanding of Node.js or Python backend development. - Contributions to design systems or open-source UI libraries. What we offer - B2B contract and company stock options. - MacBook Pro. - Modern technology stack and the opportunity to contribute to open-source projects. - An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values - Quality – We care about excellent work and high standards in everything we build. - Momentum – We take initiative, share ideas, and keep moving forward. - Accountability – We take responsibility for our work and give honest, respectful feedback. - Hard work – We believe success comes from teamwork, dedication, and consistent effort. - Learning agility – We stay curious, learn from mistakes, and continue improving. - Adapt and thrive – We welcome change and see challenges as opportunities to grow. - Win together – We work as one team, communicate openly, and support our shared goals.

🏢 Summary: Senior Frontend Developer role focused on building, maintaining, and optimizing scalable web applications using modern frontend technologies. The position involves designing web architecture, integrating APIs, and supporting CI/CD processes to deliver high-performance user experiences. The role requires strong experience in React-based ecosystems and modern DevOps practices. 🗂️ Requirements: Minimum 5 years of experience in modern frontend technologies, Strong experience with ReactJS and NextJS, Proficiency in HTML, CSS, TypeScript, and JavaScript, Experience designing scalable web architecture, Solid knowledge of REST APIs, Experience with NodeJS and package managers, Experience with CI/CD pipelines and GitHub workflows, Proficient in Git version control, Experience creating technical documentation (e.g., Confluence), English proficiency at B2 level or higher 📃 Skills: ReactJS, NextJS, HTML, CSS, TypeScript, JavaScript, REST, NodeJS, CI/CD, GitHub, Git, Confluence, Azure, GraphQL, HeadlessCMS 🏢 Description: We are seeking a highly skilled and motivated Senior Frontend Developer to join our team. The ideal candidate will have a strong background in front-end coding, troubleshooting, and optimizing web applications. You will play a key role in developing and maintaining high-quality, scalable, and performant web solutions using modern technologies. This position requires a proactive individual with excellent problem-solving skills and a passion for delivering exceptional user experiences. Must-Have Qualifications to be successful for the role: Technical Skills: Develop and maintain web applications using ReactJS / NextJS . Implement responsive designs using HTML, CSS, Typescript, and JavaScript . Create and maintain technical documentation using tools like Confluence. Design and implement scalable web architecture and artifacts. Solid knowledge of REST APIs . Experience with NodeJS and package managers. Utilize DevOps skills, including CI/CD pipelines , GitHub workflows , and actions . Manage version control using GIT effectively. Soft Skills: Strong problem-solving and troubleshooting abilities. Excellent communication and collaboration skills to work effectively in a team environment. Attention to detail and a proactive approach to identifying and resolving issues. Ability to adapt to new technologies and learn quickly. Experience: Minimum 5 years of experience in modern Frontend technologies. English proficiency should be at least B2 level. Nice-to-Have Qualifications: Experience with Azure or other cloud platforms. Experience with GraphQL. Experience with Headless CMS (Content Management System) . Optimize web performance, focusing on Core Web Vitals. Other Details: Work model: 2 days per week in the office and 3 days at home. We offer a flexible work schedule that includes 12 additional Compensation Days besides regular holidays. Note that specific work hours may vary between winter and summer schedules, and the candidate will be required to submit their CV in English.